| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem in which: when an arm part extending to a direction parallel to an optical axis of an optical element holding group is elastically deformed, a projected area becomes larger and a lens barrel increases in size so that the deformed arm part does not interfere with another optical element holding group placed on its inside.SOLUTION: A first support member includes a plurality of arm parts extending in a direction orthogonal to an optical axis and cam pins formed in the arm parts. The cam pins are pressed by elastic forces of the arm parts against facing cam grooves of a cam barrel. At least one of the arm parts is substantially parallel to a drive part of a drive unit disposed in an inner diameter side of the first support member, in a direction orthogonal to the optical axis. A plurality of ribs extending to the optical axis direction from the first support member are disposed to avoid the drive part in a direction orthogonal to the optical axis. The plurality of ribs overlap with the drive part in the optical axis direction. Engaging parts are formed at tips of the arm parts and are adjacent to engaging parts provided in the other opposing members.SELECTED DRAWING: Figure 9 |
